From owner-svn-doc-all@FreeBSD.ORG Sat Jan 10 02:29:45 2015 Return-Path: Delivered-To: svn-doc-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8937011E; Sat, 10 Jan 2015 02:29:45 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 5B2ECD0; Sat, 10 Jan 2015 02:29:45 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t0A2TjcY036591; Sat, 10 Jan 2015 02:29:45 GMT (envelope-from bjk@FreeBSD.org) Received: (from bjk@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t0A2TjTu036590; Sat, 10 Jan 2015 02:29:45 GMT (envelope-from bjk@FreeBSD.org) Message-Id: <201501100229.t0A2TjTu036590@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: bjk set sender to bjk@FreeBSD.org using -f From: Benjamin Kaduk Date: Sat, 10 Jan 2015 02:29:45 +0000 (UTC) To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r46186 - head/en_US.ISO8859-1/htdocs/news/status X-SVN-Group: doc-head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-doc-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire doc trees \(except for " user" , " projects" , and " translations" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 Jan 2015 02:29:45 -0000 Author: bjk Date: Sat Jan 10 02:29:44 2015 New Revision: 46186 URL: https://svnweb.freebsd.org/changeset/doc/46186 Log: Add PCI SR-IOV report Approved by: hrs (mentor, blanket) Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2014-10-2014-12.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2014-10-2014-12.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2014-10-2014-12.xml Sat Jan 10 01:18:47 2015 (r46185) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2014-10-2014-12.xml Sat Jan 10 02:29:44 2015 (r46186) @@ -2051,4 +2051,53 @@ + + PCI SR-IOV Infrastructure + + + + + Ryan + Stone + + rstone@FreeBSD.org + + + + + + + + +

PCI Single Root I/O Virtualization (SR-IOV) is an optional part + of the PCIe standard that provides hardware acceleration for the + virtualization of PCIe devices. When SR-IOV is in use, a function in a + PCI device (known as a Physical Function, or PF) will present multiple + Virtual PCI Functions (VF) on the PCI bus. These VFs are fully + independent PCI devices that have access to the resources of the PF. + For example, on a network interface card, VFs could transmit and + receive packets independent of the PF.

+ +

The most obvious use case for SR-IOV is virtualization. A + hypervisor like bhyve could instantiate a VF for every VM and use PCI + passthrough to assign the VFs to the VMs. This would allow multiple + VMs to share access to the PCI device without having to do any + expensive communication with the hypervisor, greatly increasing + performance of performing I/O from a VM.

+ +

Work on the core PCI infrastructure is complete and undergoing + review. Currently it is planned to commit the PCI infrastructure to + head by the end of January.

+ +

In additional to the PCI infrastructure, individual PCI drivers + must be extended to implement SR-IOV. An SR-IOV implementation is in + progress for the ixl(4) driver, which supports the Intel XL710 family + of 40G and 10G NICs. Currently it is planned to have this in review + by the end of January. An implementation for ixgbe(4) is also in + progress, but there is no timeline for completion.

+ + + Sandvine Inc. + +